Try a break of day journey to conquer the crowds, watch light spill over the caldera
https://beaulluh376.rivetgarden.com/posts/best-santorini-tours-from-cruise-ship-fast-track-shore-excursions-with-pickup-and-drop-off
Try a first light excursion to beat the crowds, watch easy spill over the caldera, and capture serene streets ahead of the island wakes up.